REPAIRS REPLACEMENT SERVICING TO HT SWITCH GEARS 66 11 KV SF6 VCB AND OVERHAULING OF 66 11 KV TRANSFORMER AT 66 KV MRS I AND MRS II UNDER GE I R AND D EAST BANGALORE

Material and labour for maintenance, servicing and repair of Vacuum Circuit Breakers / Oil circuit breaker HT 11KV 400 Amps / 800Amps 50 cycles, breaking capacity 13.5 KA of any make, by opening and checking the internal moving, fixed parts, contacts / wiring, cleaning, painting in existing colour, marking both side as per existing, decarbonising, tightening loosened parts, operational checking of closing / tripping system, lubricating greasing all moving parts, replacing worn out part, copper studs, bolts, nuts, washers, checking control wiring, oil, busbar, fixed contacts or moving contacts, HT bushes, gaskets including unserviceable coil, replacing of defective minor items such as indicators lamps, push buttons, selector switch etc as and when required complete all as specified and as directed.

Material and labour for maintenance, servicing and oil leakage arresting of 66 / 11 KV, 5/8 MVA Power Transformer, providing necessary gaskets, oil seals, cleaning, dusting, decarbonising, tightening loosened parts, including replacing worn out part copper studs, bolts, nuts and washers replacing oil seals, HT bush, gasket including unserviceable coil, including cleaning the transformers externally thoroughly with lint free cloth, tightening the HT / LT terminal nuts, opening the top cover and replacing the perished gasket of top cover, replacing sight glass, replacing of defective minor items such as and when required complete all as specified and as directed. NOTE :- The item spare parts oil to be replaced shall be measured and paid separately shall be deemed to be included in the unit rate, including decaning of old oil.

Material and labour in replacement of old unserviceable breather of power transformer 66 KV / 11 KV of capacity 5000 / 8000 KVA (capacity 5 Kg) fresh silica gel complete all as specified and as directed.

Calibration of relays through secondary injection method, testing complete outdoor 66 KV grid for complete operational working of outdoor 66 KV CT, PT, differential protection SF-6 breaker, testing 16 point solid alarm annunciator, hooter, Ammeter, Voltmeter, PF Meter, Frequency Meter, KVAR Meter, Energy Meter, Semaphore Indicators, Breaker Control Switch, Numerical Transformer Differential Relay, O/C, E/F Relay, Auxiliary Relay, High Speed tripping relay, selector switches, indicator lamps, trip circuit supervision relay, DC supply supervision relay by connecting existing control / relay cables and replacement of unserviceable control cables, transformer control SF6 breaker panel and control relay panel etc submitting reports complete all as specified and as directed.

Material and labour for Calibration of Relays through secondary injection method and testing complete relays like IDMT relays instantaneous earth fault relays on all HT OCB panel/VCB panel control SF6 breaker panel and control relay panel at MRS-I & II and every month submitting reports to Engr-in -charge. NOTE : (i) Monthly checking and calibration of all relays fixed in VCB, OCB, SF6 breaker for smooth functioning included in the scope of work. (ii) During monthly checking all tripping / setting to be ensured for proper functioning of relay / breaker.

Servicing of existing fire extinguisher and refilling of dry type fire extinguisher ever safe ABC stored pressure type with pressure 24 bar( 27 degree centigrade) and working pressure 12 bar at (27 degree centigrade) with capacity of 2 kgs to 50 kgs capacity cylinders with providing the testing certificate complete all as specified and as directed

Supply and Installation of 75kg ABC Higher Capacity Trolley Mounted Dry Chemical Powder Type Fire Extinguisher (With CO2 & Powder) complete all as specified and as directed.

Material and labour for filtration of transformer oil of transformer including OLTC through high vacuum type filtration plant to extract moisture, carbon deposits, to achieve and withstand 80 KV die electric strength for 1 min with an air gap of 2.5mm including necessary testing before and after filtration, submission of test result for 5 MVA - 02 Nos & 8 MVA - 01 No and 11/0.433 KV transformer of 200 KVA and 100KVA with providing the testing certificate complete all as specified and as directed.

Supply and topping up of new transformer oil conforming to IS 335-1963 as amended duly filtered and tested to with stand die electric strength of 60 KV for one minute with air gap 2.5 mm of HT Power and distribution transformer, OCB's, CT's, PT's, MOCB's etc complete all as specified and as directed.

Material and labour for servicing OLTC (on load top changing) system of 5/8 MVA, 66/ 11 KV power transformer after draining out transformer oil cleaning and checking the entire system, checking all moving contact portions, replacement of worn-out fixed or Roller contacts, resistor and Top gasket cleaning and checking of hylam barrier sheet (3 Nos) cleaning and checking of main driven shaft, all mechanical parts of driving mechanism, greasing where required for smooth operation, replacement of worn out brass nuts, tightening of gears, checking of entire system complete all as specified and as directed. NOTE :- Dehydration of oil, and spares required shall be measured and paid separately.